Effect of Salt Concentration on Methane Emission in a Coastal Reclaimed Paddy Soil Condition: Pot Test

간척지 논 토양의 염 농도가 메탄 배출에 미치는 영향

  • Lim, Chang-Hyun (Division of Applied Life Science, Gyeongsang National University) ;
  • Kim, Sang-Yoon (Division of Applied Life Science, Gyeongsang National University) ;
  • Jeong, Seung-Tak (Division of Applied Life Science, Gyeongsang National University) ;
  • Kim, Gun-Yeob (National Academy of Agricultural Science, RDA) ;
  • Kim, Pil-Joo (Division of Applied Life Science, Gyeongsang National University)
  • 임창현 (경상대학교 응용생명과학부) ;
  • 김상윤 (경상대학교 응용생명과학부) ;
  • 정승탁 (경상대학교 응용생명과학부) ;
  • 김건엽 (농촌진흥청 국립농업과학원) ;
  • 김필주 (경상대학교 응용생명과학부)
  • Received : 2013.09.05
  • Accepted : 2013.10.07
  • Published : 2013.12.31


BACKGROUND: Salt accumulation in coastal reclaimed soil can decrease plant growth and productivity, which could lead to considerable variation of methane($CH_4$) emission in a rice paddy. The objective of this study was to evaluate the effect of salt concentration on $CH_4$ emission in a coastal reclaimed soil. METHODS AND RESULTS: The effect of salt concentration on $CH_4$ emission and rice growth characteristics was studied by pot test, which packed by reclaimed paddy soils collected from Galsa, Hadong, Gyeongnam province. Electrical conductivity(EC) of each treatment was controlled by 0.98, 2.25, 5.05 and 9.48 dS/m and $CH_4$ emission was characterized a week interval by closed chamber method during rice cultivation. The $CH_4$ emission rate was significantly decreased with increase of salt accumulation, but total $CH_4$ flux in EC 5.50 dS/m treatment was lower than those of EC 9.48 dS/m treatment. It seems because of higher content of water soluble $SO{_4}^{2-}$ in EC 5.50 dS/m treatment than those of EC 9.48 dS/m treatment. Rice growth and grain yield were significantly decreased with increase of salt accumulation. Soil properties, especially EC and pH were negatively correlated with $CH_4$ flux, while rice growth characteristics like plant height and tiller number show significantly positive correlation with $CH_4$ flux. CONCLUSION(S): Conclusively, salt accumulation significantly decreased $CH_4$ flux in a rice paddy, which could be useful information for evaluating $CH_4$ flux in reclaimed area in Korea.


Grant : Cooperative Research Program for Agriculture Science & Technology Development

Supported by : Rural Development Administration


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